[URL="http://api.tweetmeme.com/share?url=http://espn.go.com/nfl/story/_/id/7955675/mike-shanahan-knocked-ground-washington-redskins-brandyn-thompson&service=bit.ly&source=espn"][IMG]http://api.tweetmeme.com/imagebutton.gif?url=http://espn.go.com/nfl/story/_/id/7955675/mike-shanahan-knocked-ground-washington-redskins-brandyn-thompson[/IMG][/URL]Washington Redskins coach Mike Shanahan was knocked to the turf when defensive back Brandyn Thompson slammed into him on a play during the team's first full-squad workout in its new indoor practice field.